Newcomers tend not to know any better. There's a parallel here with mobile gaming. Stuff like Dungeon Keeper Mobile or Clash of Clans, where the entire game revolves around tapping blocks a few times and then either waiting for 24 hours to tap some more or paying real world money to get rid of the timers.
To a huge number of people: this is video games. And they enjoy it and praise it and write glowing reviews. But they tend not to play other stuff. Would they love Clash of Clans so much if they had experience of Final Fantasy, Deus Ex, Grand Theft Auto? I really, really doubt it. Source: vast numbers of people who have played those games can't stand mobile games like Clash of Clans.
The point is: yes, newcomers are more open. But they'll also be more open to whatever you put in front of them. If you give them something fresh and new and never seen before, it's just the same to them than if you were to give them random, turn based battles and classic themes. And let me be clear - I don't have anything against trying new things. But I also don't believe in discarding what has worked before just because 'it's already been done'. You don't throw away round wheels because cars have had round wheels for ages and isn't it getting a bit old? There's a reason wheels are that shape, and there's a reason 'classic' games endure for years and years.